With the help of private detectives and hidden cameras, Sabrina Grant examines the lives of slim people who don't think they do anything differently from anyone else
Sabrina meets teaching assistant Hayley from Eastbourne, a chocolate fan with a busy lifestyle, and takeaway fan Rinia from Surrey
Hayley and Rinia: Sabrina meets Hayley, a chocolate fan with a busy lifestyle, and takeaway fan Rinia
Gaby and Karl: Karl doesn't know why he's never gained weight. Is Gaby's digestive system why she's slim?
James and Margaret: James struggles to put on weight, in spite of what he eats
Ria and Kirk: With busy teacher Kirk, and Ria, whose food choices don't seem to impact her body size